Selected Projects

Below is a non-exhaustive list of my non-research projects. You can also check out a complete list of my projects here.

Contrastive Learning-based Few-shot Image Classification [Code]

• Defined a custom contrastive loss and trained a few-shot version of Siamese Networks to do n-way k-shot image classification by mapping the image similarity task into a fully-supervised classification learning task.
• Libraries/Framework: Numpy, Matplotlib, PyTorch, and TorchVision

Molecule Graph Generation [Code]

• Implemented Graph Convolutional Networks-based Variational Graph AutoEncoders to generate new molecular graphs that possess similar statistical distribution as that of the learned distribution of molecular graphs (used to train the model).
• Libraries/Framework used: PyTorch, PyTorch Geometric, Numpy, and NetworkX

Text-to-Image Generation using GANs [Code]

• Implemented a Stage-wise StackGAN model capable of producing photo-realistic images conditioned on text descriptions. It is also able to contain necessary details and vivid object parts while generating high-quality images.
• Given the text description, the Stage-1 GAN forms the primitive shape and colors of the object. It puts less emphasis on the quality of the image being formed, thereby yielding a low-resolution image.

• The Stage-2 GAN takes Stage-1 results and text descriptions as inputs and generates high-resolution images with photo-realistic details and thus can rectify defects in Stage-1 results and add compelling details with the refinement
  process.

• Libraries/Framework: Keras, Tensorflow, Numpy, Pandas, and Matplotlib

An Unsupervised Approach to Generate Sentence Embeddings [Code]

• Trained a simple contrastive learning-based framework to perform text similarity, where sentences with similar semantic features attain higher similarity scores.
• Used a pre-trained BERT model to generate two different, yet semantically similar representations for each input sentence with minimal variation.

• To compute the degree of similarity between these latent representations, employed a cosine
  similarity-based contrastive metric.

• Libraries/Framework: Scikit-learn, Tensorflow, Numpy, Pandas, and Transformers

Zero-shot Question Answering with Large Language Models [Code]

• Implemented a zero-shot question-answering system that, for each question q with available answer options a, b, and c, computes each option’s score as the negative log-likelihood under the language model conditioned on the question and then returns the option with the highest score as the most probable answer to the question q.
• Libraries/Framework: Transformers, Numpy, and Tensorflow